Crashes on RangeError when not compiled with -d:danger

While investigating this issue in nimlsp I noticed that if nimsuggest is compiled without -d:danger it will crash with a RangeError:
[peter /tmp ] $ cat test.nim
type MyType = object
  x: int

var y: MyType
y.
[peter /tmp ] $ ./Nim/nimsuggest/nimsuggest --debug --stdin test.nim
Hint: used config file '/tmp/Nim/config/nim.cfg' [Conf]
Hint: used config file '/tmp/Nim/config/config.nims' [Conf]
usage: sug|con|def|use|dus|chk|mod|highlight|outline|known file.nim[;dirtyfile.nim]:line:col
type 'quit' to quit
type 'debug' to toggle debug mode on/off
type 'terse' to toggle terse mode on/off
> sug test.nim 5 3
/tmp/Nim/nimsuggest/nimsuggest.nim(639) nimsuggest
/tmp/Nim/nimsuggest/nimsuggest.nim(636) handleCmdLine
/home/peter/.choosenim/toolchains/nim-0.20.2/compiler/cmdlinehelper.nim(92) loadConfigsAndRunMainCommand
/tmp/Nim/nimsuggest/nimsuggest.nim(545) mainCommand
/tmp/Nim/nimsuggest/nimsuggest.nim(493) mainThread
/tmp/Nim/nimsuggest/nimsuggest.nim(459) execCmd
/tmp/Nim/nimsuggest/nimsuggest.nim(213) execute
/tmp/Nim/nimsuggest/nimsuggest.nim(197) executeNoHooks
/home/peter/.choosenim/toolchains/nim-0.20.2/compiler/modules.nim(147) compileProject
/home/peter/.choosenim/toolchains/nim-0.20.2/compiler/modules.nim(95) compileModule
/home/peter/.choosenim/toolchains/nim-0.20.2/compiler/passes.nim(206) processModule
/home/peter/.choosenim/toolchains/nim-0.20.2/compiler/passes.nim(78) closePasses
/home/peter/.choosenim/toolchains/nim-0.20.2/compiler/sem.nim(624) myClose
/home/peter/.choosenim/toolchains/nim-0.20.2/compiler/suggest.nim(628) suggestSentinel
/home/peter/.choosenim/toolchains/nim-0.20.2/compiler/msgs.nim(99) newLineInfo
/home/peter/.choosenim/toolchains/nim-0.20.2/lib/system/fatal.nim(48) sysFatal
Error: unhandled exception: value out of range: -1 [RangeError]
[peter /tmp ] $ cd Nim/nimsuggest     
[peter /tmp/Nim/nimsuggest (devel) ✓ ] $ nimble build -d:danger
   Warning: The .nimble file for this project could make use of additional features, if converted into the new NimScript format.
        ... For more details see:https://github.com/nim-lang/nimble#creating-packages
  Verifying dependencies for nimsuggest@0.1.0
      Info: Dependency on compiler@#head already satisfied
   Warning: Package 'compiler' has an incorrect structure. It should contain a single directory hierarchy for source files, named 'compiler', but file 'crashtester.nim' is in a directory named 'nimsuggest' instead. This will be an error in the future.
      Hint: If 'nimsuggest' contains source files for building 'compiler', rename it to 'compiler'. Otherwise, prevent its installation by adding `skipDirs = @["nimsuggest"]` to the .nimble file.
  Verifying dependencies for compiler@#head
   Building nimsuggest/nimsuggest using c backend
[peter /tmp/Nim/nimsuggest (devel) ✓ ] $ cd ../..
[peter /tmp ] $ ./Nim/nimsuggest/nimsuggest --debug --stdin test.nim
Hint: used config file '/tmp/Nim/config/nim.cfg' [Conf]
Hint: used config file '/tmp/Nim/config/config.nims' [Conf]
usage: sug|con|def|use|dus|chk|mod|highlight|outline|known file.nim[;dirtyfile.nim]:line:col
type 'quit' to quit
type 'debug' to toggle debug mode on/off
type 'terse' to toggle terse mode on/off
> sug test.nim 5 3
sug skVar   test.y  MyType  /tmp/test.nim   4   4   ""  0   None
sug skType  test.MyType MyType  /tmp/test.nim   1   5   ""  0   None
sug skProc  system.inc  proc (x: var T: Ordinal or uint or uint64, y: int){.noSideEffect.}  /tmp/Nim/lib/system.nim 937 5   "Increments the ordinal ``x`` by ``y``.\x0A\x0AIf such a value does not exist, ``OverflowError`` is raised or a compile\x0Atime error occurs. This is a short notation for: ``x = succ(x, y)``.\x0A\x0A.. code-block:: Nim\x0A var i = 2\x0A inc(i)    # i <- 3\x0A inc(i, 3) # i <- 6" 0   None
sug skProc  system.add  proc (x: var string, y: string){.noSideEffect.} /tmp/Nim/lib/system.nim 1900    5   "Concatenates `x` and `y` in place.\x0A\x0A.. code-block:: Nim\x0A  var tmp = \"\"\x0A  tmp.add(\"ab\")\x0A  tmp.add(\"cd\")\x0A  assert(tmp == \"abcd\")"  0   None
sug skEnumField system.bool.true    bool    /tmp/Nim/lib/system.nim 45  15  ""  0   None
sug skProc  system.len  proc (x: string): int{.noSideEffect.}   /tmp/Nim/lib/system.nim 1037    5   "Returns the length of a string.\x0A\x0A.. code-block:: Nim\x0A  var str = \"Hello world!\"\x0A  echo len(str) # => 12" 0   None
sug skEnumField system.bool.false   bool    /tmp/Nim/lib/system.nim 45  4   ""  0   None
sug skConst system.off  bool    /tmp/Nim/lib/system.nim 58  2   ""  0   None
sug skProc  system.ord  proc (x: T: Ordinal or enum): int{.noSideEffect.}   /tmp/Nim/lib/system.nim 1117    5   "Returns the internal `int` value of an ordinal value ``x``.\x0A\x0A.. code-block:: Nim\x0A  echo ord(\'A\') # => 65\x0A  echo ord(\'a\') # => 97"  0   None
nim-lang / nimsuggest

Crashes on RangeError when not compiled with -d:danger #108
